What does it mean for Wang Wen to be arrested and play Zhouyi?

The meaning of this sentence is as follows:

1, Xibo Ji Chang was imprisoned in the prison, and the gossip in Zhouyi was interpreted as sixty-four hexagrams.

2. During his detention, Ji Chang devoted himself to the research of Fuxi Bagua, which is the embryonic form of Zhouyi.

3. Ji Chang's descendants put Ji Chang's ideas and comments on governing the country and his own feelings into a book. Because Ji Chang was named, the writing function was named "Zhou", which is commonly known as Zhouyi. Solemnly declare: the above contents are for reference only, please don't be blindly superstitious.